Home extensions in Barrow-in-Furness
Planning an extension in Barrow-in-Furness? Compare extension types, see guide prices adjusted for Barrow-in-Furness and book a free site visit.
- Postcode districtsLA13, LA14
- Price regionNorth West England (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation

What works best for Barrow-in-Furness houses?
The North West has a high share of Victorian and Edwardian terraces with rear yards and outriggers, plus large areas of inter-war semis in the suburbs.
For many houses here, single-storey rear extensions, kitchen extensions or side return extensions gives the most useful space for the budget.
Approvals for an extension in Barrow-in-Furness
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
In England a two-storey rear extension is permitted development only if it projects no more than 3 m from the original rear wall, sits at least 7 m from the rear boundary, matches the roof pitch and uses obscure, non-opening side windows upstairs. Most two-storey extensions therefore go through a householder planning application, which costs £548 from 1 April 2026 and normally takes about 8 weeks.
In a conservation area, national park, National Landscape, the Broads or a World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Applications are decided by the local planning authority (your district, borough or unitary council).
Where we work near Barrow-in-Furness
Site visits are available across Barrow-in-Furness (LA13, LA14). The same team covers Ulverston (9 miles), Kendal (24 miles), Whitehaven (34 miles), Workington (39 miles), Penrith (42 miles), all within easy reach. Morecambe, in Lancashire, is roughly 15 miles from Barrow-in-Furness and also on our list.
Guide prices for Barrow-in-Furness
Every figure below is a guide for Barrow-in-Furness, adjusted for North West England build costs (×0.95) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Orangery extensions | 16 m² | £42,500 – £53,500 |
| Side return extensions | 11 m² | £25,000 – £31,500 |
| Extensions over a garage | 12 m² | £23,500 – £31,000 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
| Wraparound extensions | 25 m² | £54,500 – £69,000 |
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
Every extension type in Barrow-in-Furness
- Side return extensions · from £17,000
- Bedroom extensions · from £24,500
- Flat roof extensions · from £19,500
- Bungalow extensions · from £24,500
- Glass box extensions · from £28,500
- Kitchen extensions · from £25,500
- Wraparound extensions · from £34,000
- Home office extensions · from £15,000
- Annexe extensions · from £52,000
- Single-storey rear extensions · from £19,500
- Timber frame extensions · from £19,500
- Porch extensions · from £3,800
- Side extensions · from £20,500
- Extensions over a garage · from £22,500
- Planning permission for extensions · from £300
- Building regulations for extensions · from £850
- Conservatory replacement extensions · from £19,000
- Double-storey extensions · from £36,000
- Extension plans and drawings · from £1,100
- Pitched roof extensions · from £21,000
- Utility and boot room extensions · from £13,000
- Orangery extensions · from £28,500
Free site visit
We visit your Barrow-in-Furness home, measure up, talk through what you want and check the planning position.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions about extensions in Barrow-in-Furness
How much does an extension cost in Barrow-in-Furness?
Using our North West England factor (×0.95), a standard-spec single-storey extension of 20 m² is a guide £38,500 to £49,500 including VAT, and a 32 m² two-storey extension £54,500 to £71,500. Your written price follows the survey.
Will my neighbours need to be told?
If you apply for planning or prior approval the council notifies them, and in England party wall notices may be needed for work near a shared boundary.
Who do I contract with?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Barrow-in-Furness, and the guide-price tool gives a range for your own size and finish in about a minute.
Do you cover all of Barrow-in-Furness?
Yes, including the surrounding parts of Cumbria. Site visits are free and there is no obligation.
Book a free site visit in Barrow-in-Furness
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.